Results 111 to 120 of about 382 (145)

The Spruce Budworm in Eastern North America

1988
The spruce budworm, Choristoneura fumiferana (Clemens), (Lepidoptera: Tortricidae) was first described from specimens collected in Virginia,17 but this native insect occurs primarily in the northern boreal forest from Newfoundland west to the McKenzie River near 66°N.53 The most extensive and destructive outbreaks have occurred in the maritime ...
William J. Mattson, Gary A. Simmons, John A. Witter   +2 more
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Feeding responses of eastern spruce budworm larvae to sucrose and other carbohydrates

Journal of Chemical Ecology, 1982
Spruce budworm larvae reared on an artificial diet were tested for preference of twelve carbohydrates over a water control. A strong preference for sucrose was seen, followed by fructose, inositol, and glucose. Male and female larvae do not differ in their responses to sucrose.
P J, Albert, C, Charley, F, Hanson, S, Parisella   +3 more
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Integrated pest management and the eastern spruce budworm

Forest Ecology and Management, 1991
Abstract The eastern spruce budworm, Choristoneura fumiferana (Clem.), is one of the most widely distributed and the most destructive forest insects in North America. The recent outbreak of this pest extending over the 1970s and early 1980s was unprecedented in size and severity.
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CHEMORECEPTORS ON THE PROBOSCIS OF THE FEMALE EASTERN SPRUCE BUDWORM: ELECTROPHYSIOLOGICAL STUDY

Entomologia Experimentalis et Applicata, 1975
The physiology of the sensilla styloconica on the proboscis of the female spruce budworm was studied using tip‐ and sidewall‐recording techniques. One receptor cell showed a concentration‐dependent response to sucrose and honey solutions with an immediate rise of the spike activity which adapted within one second to half the initial frequency ...
ERICH STÄDLER, W. D. SEABROOK
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Disruption of Sex Attraction in the Eastern Spruce Budworm

Environmental Entomology, 1976
Small scale field trials demonstrated that trans -11-tetradecenal containing a small amount of the cis isomer sex attractant of the eastern spruce budworm, Choristoneura fumiferana (Clemens), is capable of preventing males from locating virgin females.
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Paradigms in Eastern Spruce Budworm (Lepidoptera: Tortricidae) Population Ecology: A Century of Debate

Environmental Entomology, 2016
Three main hypotheses have been postulated over the past century to explain the outbreaking population dynamics of eastern spruce budworm, Choristoneura fumiferana (Clemens). The Silviculture Hypothesis first arose in the 1920s, with the idea that outbreaks were driven by forestry practices favoring susceptible softwood species.
Deepa S, Pureswaran, Rob, Johns, Stephen B, Heard, Dan, Quiring   +3 more
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Repellency of oral exudate to eastern and western spruce budworm larvae (Lepidoptera: Tortricidae)

Journal of Chemical Ecology, 1996
A two-choice feeding bioassay was used to investigate the intra-specific repellency of the larval oral exudate of eastern and western spruce budworms,Choristoneura fumiferana (Clem.) andC. occidentalis Free., respectively. Results of the bioassay indicated that feeding behavior on artificial diet-drop feeding stations was modified in the presence of ...
L M, Poirier, J H, Borden
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TESTS OF MOTOR STIMULANTS FOR EASTERN SPRUCE BUDWORM MOTHS (LEPIDOPTERA: TORTRICIDAE)

The Canadian Entomologist, 1979
AbstractThe insecticide phosphamidon, both alone and mixed with other chemicals, was tested in the laboratory as a motor stimulant to female spruce budworm moths. For phosphamidon alone, the time to reaction of virgin female budworm (Choristoneura fumiferana) moths was about 40 min.
W. Jan A. Volney, George A. McDougall
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Second Diapause in Spruce Budworm from Eastern Canada

The Canadian Entomologist, 1961
In eastern Canada larvae of the spruce budworm, Choristoneura fumiferana (Clem.), complete their development in one year, undergoing only one period of winter diapause in the second instar, whereas in certain parts of British Columbia, at high altitudes, two years are normally required for development, the larvae spending a second period of winter ...
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Plasticity of cold-hardiness in the eastern spruce budworm, Choristoneura fumiferana

2020
Of all abiotic factors that drive range boundaries, temperature is the best studied because of its pervasive influence on biological processes. For populations at high-latitudes, extreme cold and the populations’ cold-hardiness set the range boundary. Phenotypic plasticity, where a single genotype results in differentiated phenotypes under differential
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